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I have a front and rear brake kit for a 10th generation civic si that are still packaged and never opened. Car has been sold and no longer need them. Local Pickup only $100 Delaware Ohio

Parting Out 2017 Civic Si 1. PRL cold air intake Race MAF $200 2. K-Tuner V2 unlocked $450 3. TSP Flex Fuel kit $200 4. Avid Av20 18x9.5 38 wheels with Michelin Pilot A/S3 Plus 245/40ZR18 tires 4k miles on wheels and tires. 2 rims have very minor curb rash $1,000 local pickup only 5. Rhino-Rack...

Just got my flex fuel set up and just running the 19/23 flex fuel ktuner map. I know you can change the boost percentage and timing in the table but has anyone done this and if so what does your table look like and what boost percentage are you adding? Thanks in advance!

Just dropped off the SI at the shop for an Fx350 and PLM downpipe and Front pipe install!! Ill keep everyone updated and give a review once I get the car back! I can't wait to finally be able to utilize all the power this car is making and look forward to a flex fuel upgrade in the near future...

I'm trying to decide if I should get a Downpipe and Front Pipe but I don't want to make my car too loud. For those of you who have bought new pipes what are your thoughts? any regrets? This is my daily commuter and I don't want highway drone or my car to be very raspy. I have researched sound...

I'm going to have my clutch upgraded next month to an fx300. I was wondering if during the install of the clutch would they have to drop the front pipe and downpipe anyways? If so it might be a good excuse to swap them out with a prl front pipe and downpipe.

So over the last 2 months of owning my 2017 civic si i have noticed a very concerning trend. After I leave my car at idle for 5 to 10 minutes while I'm eating or waiting on someone I notice some blue smoke coming from the exhaust pipe. I can actually see it in my rearview mirror and I believe it...